Ore-feeder.



PATBNTBD sEPT.`25, 190e.

No. a31,595.

r F. H..BLANDING.

ORB FEEDER.

APPLICATION EILLED MAY 15. 1905.

"Hin,i

.qllylilullmmh TINITEI) STATES PATENT OFFICE.

FORREST H. .BLANDING, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO UNIONIRON WORKS COMPANY, OF SAN FRANCISCO, CALIFORNIA, A

CORPORATION.

Specification of Letters Patent.

Patented Sept. 25,1906.

Application filed May l5, 1905. Serial No. 260.410.

To @ZZ whom, t may con/cern;

Be it known that I, FORREST H. BLAND- ING, a citizen of the UnitedStates, residing in the city and county of San Francisco, State ofCalifornia, have invented certain new and useful Improvements inOre-Feeders; and I hereby declare the 'following to be a full, clear,and exact description of the same.

The present invention relates more particularly to the means foractuating or imparting a step rotation to the feed-table of the machine,the object of the invention be ing to materially simplify theconstruction of said means and to dispense with the expensiveclutch-actuated mechanism generally employed to transmit a step rotationto the drive-shaft for operating the feed-table.

To successfully carry out the invention, a rock-shaft is substituted forthe usual rotatable shaft, on which rock-shaft is loosely mounted adrive-gear for imparting a step rotation to the 'feedtable, which gearis intermittently operated through the medium of friction means carriedby the rock-shaft, said friction means constituting a direct connectionbetween the said rock-shaft and the drive-gear for the rotatablefeed-table.

To comprehend the invention, reference should be had to the accompanyingsheet of drawings, whereind Figure l is a front view in elevation of theore-feeder. Fig. 2 is a side view in elevation of the apparatus with itsfeed-hopper partially removed. Fig. 3 is a broken detail view of therock-shaft, the loose gear thereon and the cam secured to the shaftbeing in vertical section; and Fig. 4 is a detail view of the cam andgear, said view disclosing the preferred form of friction means forengaging with the gear to impart a step rotation to the feed-table.

In the drawings the numeral 1 is used to designate any suitable form ofasupportingframe, within which is located the rotatable feed-table 2.This horizontal table is mounted on the spindle 3, the said table havingore delivered thereto by any suitable meansas, for instance, anyordinary feed-hopper 4. The ore fed or delivered onto the table 2 isremoved or guided therefrom during the rotary movement of the table bymeans of the guide blades or plates 5 5. These parts are of the usualconstruction and call for no specific description herein.

To the under face of the table r2 there is secured a gear-ring 6, whichmeshes with the gear 7. This gear 7 is loose on the rockshaft S, whichshaft works in suitable bearings of the vframe l. To the said shaft 8there is secured suitable 'frictional means for interlocking with thegear 7 when motion is imparted to the shaft 8 for the purpose ofimparting a step rotation to the feed-table 2. In the present case thefrictional lock means comprises a cam-wheel 0, which is secured t0 therock-shaft S. The said cam-wheel 9 is placed on the shaft S, so that itis located within the sphere of the flange 9 of the gear 7. In theperiphery of the cam-wheel one or more transverse seats l0 are formed,in each seat there being loosely ttedv a roll 1l. These rolls are heldagainst lateral displace ment by the web of the gear 7 and the circularflange l2 of the cam-wheel 9.

Each peripheral seat l0 is Vformed with an inclined surface 1.3, uponwhich the roll 11 works during the forward throw of the camwheel, due tothe movement of the rockshaft 8. As the roll or rolls ride on theinclined surface of the seat or. seats 10 the same bear firmly againstthe under face of the flange 9 of the gear 7, the frictional engagementtherewith being sufficient to lock the gear 7 to the cam-wheel 9, hencecausing the said gear 7 to be rotated with the movement of the cam-wheel9, which gear in turn transmits its motion to the feed-table 2 andimparts thereto a step rotation.

It will be understood that the diameter of the friction roll or rolls llis such as to bear lightly against the under face of the flange 9 at alltimes. Consequently the moment the cam-wheel 9 starts to rotate the rollor rolls 1l immediately commence to ride on its ineline 13 and to bindagainst the said under face of the flange 9. As a reverse movement isgiven to the rock-shaft S to restore the same to position the roll orrolls ll move downward into the seat l0 of the cam-wheel or out offrictional contact with the flange of the gear 7. The feed-table 2 isthus left in its moved position, while the cam-wheel is thrown backwardwith the return movement of the rock-shaft 8. The rock-shaft S isoscillated by a lever 14, fulcruined to the iframe of the machine, theinner end of the said lever being connected by a link to a crankarm 16,extending from the rock-shaft 8. The outer end of the said lever 14 isupheld by the spring 17. Thefulcrumed lever 14 1s actuated by anysuitable means-as, for instance, by the tappet-cam 18, Which cam issecured to a rotating shaft 19.

Having thus described the invention, What is claimed as new, and desiredto be protected by Letters Patent, is

1. In an ore-feeder, the combination of a rotatable feed-table, of arock-shaft, of a gear loose on said shaft engaging the feedtable, ofmeans secured to the said shaft for frictionally engaging With the gearto actuate the same With the movement of the rockshaft, and cam-actuateddevices for imparting motion to the said rockeshaft.

2. In an ore-feeder, the combination of a rotatable feed-table, of arock-shaft, a gear for operating the feed-table loose on saidrock-shaft, of a cam-Wheel secured to and carried by the rock-shaft,means carried by the cam-Wheel for frictionally engaging the gear on onestroke of the cam-Wheel, and devices for actuating the rock-shaft.

3.In"anorefeeder, the combination -With the rotatable feed-table, of arock-shaft, a gear for operating the feed-table loose on said shaft, acam secured to the rook-shaft, an inclined seat in the periphery of saidcam, a roll loose in said seat, said roll on one movement ofthe camfrictionally engaging the gear and rotating the same to impart a steprotation to the feed-table, and means for actuating the rock-shaft. A

4. In an ore-feeder, the combination with a rotatable feed-table, of arock-shaft, eamactuated means for imparting movement to the rock-shaft,a gear for operating the feedtable loose on said shaft, a cam secured tothe rock-shaft having an inclined seat in the periphery thereof, a rollloose in said seat, said roll in one movement of the cam frictionallyengaging the gear and rotating the same to impart a step-by-steprotation to the feed-table.

In testimony Whereof I have hereunto affixed my signature in thepresence of Witnesses.

FORREST H. BLANDING.

Witnesses:

N. A. ACKER, D. B. RICHARDS.

